US Bridges

21st ST over Big Eagle Creek

Fair

Marion County, Indiana · 00.30 E I-465 · Structure no. 4900196

Built
1972
53 years old, rebuilt 1986
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
262 ft
3 main spans
Daily traffic
12,917
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

21st ST over Big Eagle Creek is a steel continuous stringer/multi-beam or girder carrying 21st ST over Big Eagle Creek in Marion County, Indiana. It was built in 1972 and reconstructed in 1986, so it is 53 years old, older than the Indiana average of 46.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 12,917 vehicles a day, roughly 5% of them trucks, projected to reach 19,190 by 2039. The structure is 262 ft (79.8 m) long and 34 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
Carries21st ST
CrossesBig Eagle Creek
Location00.30 E I-465
RouteCity Street 148
CountyMarion County
StateIndiana
Coordinates39.79428, -86.26874
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.2 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length262 ft (79.8 m)
Longest span99 ft (30.3 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,917 (2019)
Projected traffic19,190 by 2039
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 21st ST over Big Eagle Creek built?

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 1986.

What condition is 21st ST over Big Eagle Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.

How much traffic does 21st ST over Big Eagle Creek carry?

About 12,917 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is 21st ST over Big Eagle Creek?

The structure is 262 ft (79.8 m) long with a longest span of 99 ft (30.3 m) and a deck 34 ft wide.

Who owns 21st ST over Big Eagle Creek?

It is owned by the City or Municipal Highway Agency.